CN214957121U

CN214957121U - Power battery pack

Info

Publication number: CN214957121U
Application number: CN202121640356.3U
Authority: CN
Inventors: 陈卓烈; 崔鑫; 何亚飞
Original assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Current assignee: Envision Power Technology Jiangsu Co Ltd; Envision Ruitai Power Technology Shanghai Co Ltd
Priority date: 2021-07-19
Filing date: 2021-07-19
Publication date: 2021-11-30
Anticipated expiration: 2031-07-19

Abstract

The utility model relates to a power battery technical field especially relates to a power battery package. The battery module comprises a plurality of battery core assemblies and a module shell which are arranged side by side, and exhaust holes are formed in two ends of the module shell; the battery shell comprises a first bottom plate, a first end plate and a first side plate, the first end plate and the first side plate are respectively and vertically arranged on the first bottom plate, and a smoke channel beam is arranged on the inner wall of the first bottom plate; the exhaust valve group is arranged at two ends of the battery module and comprises a plurality of exhaust valves, the exhaust valves are respectively communicated with the exhaust holes and the smoke channel beam, and the exhaust valves can enable smoke generated by the battery module to flow to the smoke channel beam in a one-way mode. Because discharge valve can make the flue gas unidirectional flow that the battery module produced to the flue gas passageway roof beam, consequently high temperature flue gas can not be by the backward flow of flue gas passageway roof beam to other battery modules, has guaranteed the security of power battery package when taking place thermal runaway, reduces the loss.

Description

Power battery pack

Technical Field

The utility model relates to a power battery technical field especially relates to a power battery package.

Background

The power battery system generally mainly comprises a battery module, a battery management system BMS, a thermal management system, some electrical and mechanical systems and the like. When the vehicle surpassed normal operating mode, electric core also surpassed the boundary that allows the use to increase the heat production volume, make self temperature uprise, can influence the performance and the life-span of battery when self temperature surpassed its normal operating temperature scope. And power battery system on the electric automobile comprises a plurality of electric cores, and power battery system produces a large amount of heat gathers in narrow and small battery box in the course of the work, and if the heat can not dispel in time fast, high temperature can influence power battery life-span and even the thermal runaway appears, leads to the explosion of starting a fire etc..

In the prior art, when thermal runaway occurs in one battery module, thermal runaway easily occurs in the adjacent battery module, so that the battery assembly explodes, and the safety of the battery assembly is reduced.

Therefore, a power battery pack is needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a power battery package can prevent to influence its peripheral battery module after the battery module thermal runaway.

To achieve the purpose, the utility model adopts the following technical proposal:

provided is a power battery pack including:

the battery module comprises a plurality of battery element assemblies and a module shell which are arranged side by side, and exhaust holes are formed in two ends of the module shell;

the battery shell comprises a first bottom plate, a first end plate and a first side plate, wherein the first end plate and the first side plate are respectively and vertically arranged on the first bottom plate, and a smoke channel beam is arranged on the inner wall of the first bottom plate;

exhaust valves set up in the both ends of battery module, exhaust valves includes a plurality of discharge valve, discharge valve respectively with the exhaust hole with flue gas passageway roof beam intercommunication, discharge valve can make the flue gas unidirectional flow that battery module produced extremely flue gas passageway roof beam.

As a preferred technical scheme of the power battery pack, the exhaust valve is a tesla valve, and the exhaust holes are arranged in one-to-one correspondence with the tesla valve.

As a preferable technical solution of the above power battery pack, the module housing includes a second bottom plate, a second end plate and a second side plate, the second end plate and the second side plate are respectively and vertically disposed on the second bottom plate, and the exhaust hole is disposed on the second end plate.

As a preferable technical scheme of the power battery pack, the first side plate of the battery shell is provided with an explosion-proof valve, and the smoke channel beam is communicated with the explosion-proof valve.

As a preferable technical scheme of the power battery pack, the flue gas channel beam comprises an air inlet beam and an air outlet beam, the air inlet beam is communicated with the air outlet beam, the air outlet valve is communicated with the air inlet beam, and the air outlet beam is communicated with the explosion-proof valve.

As a preferable technical scheme of the power battery pack, the air inlet beams are arranged on two sides of each battery module.

As a preferable technical solution of the power battery pack, a plurality of the intake beams are communicated with one of the exhaust beams.

As a preferred technical scheme of above-mentioned power battery package, electric core subassembly is including piling up a plurality of electric cores that set up side by side, be provided with electrode tab on the electric core.

As a preferred technical scheme of the power battery pack, each of the battery cells is correspondingly provided with one of the exhaust holes.

As a preferred technical scheme of the power battery pack, the battery modules are connected in series through copper bars.

The utility model discloses beneficial effect:

the utility model provides a power battery pack, which comprises a battery module, a battery shell and an exhaust valve group, wherein the battery module comprises a plurality of battery core assemblies and a module shell which are arranged side by side, and exhaust holes are arranged at two ends of the module shell; the battery shell comprises a first bottom plate, a first end plate and a first side plate, wherein the first end plate and the first side plate are respectively and vertically arranged on the first bottom plate, and a smoke channel beam is arranged on the inner wall of the first bottom plate; the exhaust valve group sets up in the both ends of battery module, and the exhaust valve group includes a plurality of discharge valve, discharge valve respectively with exhaust hole and flue gas passageway roof beam intercommunication, discharge valve can make the flue gas unidirectional flow that the battery module produced to the flue gas passageway roof beam. When thermal runaway appeared in the battery module, high temperature flue gas entered into the flue gas channel roof beam through the exhaust hole in, because discharge valve can make the flue gas unidirectional flow that the battery module produced to the flue gas channel roof beam, consequently high temperature flue gas can not be by the return flow of flue gas channel roof beam to other battery modules, has guaranteed the security of power battery package when taking place thermal runaway, the reduction loss.

Drawings

Fig. 1 is a schematic structural diagram of a power battery pack provided in an embodiment of the present invention;

fig. 2 is a top view of a power battery pack provided by an embodiment of the present invention;

fig. 3 is a cross-sectional view of a power battery pack provided by an embodiment of the present invention.

In the figure:

1. a battery module; 11. a second end plate; 111. an exhaust hole; 2. a battery case; 21. a first base plate; 22. a first end plate; 23. a first side plate; 24. a flue gas channel beam; 241. an air intake beam; 242. an exhaust beam; 3. an exhaust valve group; 4. an explosion-proof valve; 5. copper bars are arranged.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The utility model provides a power battery package, this power battery package are at the during operation, and other battery module 1 can not influenced when one of them battery module 1 takes place the thermal runaway to control the thermal runaway scope effectively, protection power battery package reduces the loss.

As shown in fig. 1-3, the power battery pack includes: battery module 1, battery case 2 and exhaust valve group 3, wherein battery module 1 is a plurality of, and a plurality of battery modules 1 set up side by side, through copper bar 5 series connection between the adjacent battery module 1. The battery module 1 comprises a plurality of cell assemblies and a module shell which are arranged side by side, and exhaust holes 111 are formed in two ends of the module shell; the battery shell 2 comprises a first bottom plate 21, a first end plate 22 and a first side plate 23, wherein the first end plate 22 and the first side plate 23 are respectively and vertically arranged on the first bottom plate 21, and a smoke channel beam 24 is arranged on the inner wall of the first bottom plate 21; exhaust valve group 3 sets up in battery module 1's both ends, and exhaust valve group 3 includes a plurality of discharge valves, discharge valve respectively with exhaust hole 111 and flue gas passageway roof beam 24 intercommunication, discharge valve can make the one-way flow of flue gas to flue gas passageway roof beam 24 that battery module 1 produced.

When thermal runaway appeared in battery module 1, high temperature flue gas entered into flue gas channel roof beam 24 through exhaust hole 111 in, because discharge valve can make the flue gas unidirectional flow that battery module 1 produced to flue gas channel roof beam 24, consequently high temperature flue gas can not flow back to other battery modules 1 by flue gas channel roof beam 24, and high temperature flue gas all is in flue gas channel roof beam 24 in the emission process flue gas, has guaranteed the security of power battery package when taking place thermal runaway, reduces the loss.

It will be appreciated that the vent valve is a one-way gas flow valve. Preferably, in the present embodiment, the exhaust valve is a tesla valve, and as shown in fig. 3, the exhaust holes 111 are arranged in one-to-one correspondence with the tesla valve. That is, one tesla valve is provided for each exhaust hole 111. The Tesla valve is a one-way conduction airflow valve invented by a famous scientific scientist Nigla Tesla, has no movable part, can realize one-way conduction of airflow without inputting energy, and is a one-way gas circulation valve; when the high-temperature flue gas that battery module 1 that takes place thermal runaway produced reachs the tesla valve, the high-temperature flue gas passes through the tesla valve and enters into flue gas channel roof beam 24 in, though a plurality of tesla valves communicate with a flue gas channel roof beam 24 simultaneously, but the high-temperature flue gas can not flow back to in the exhaust hole 111 that other tesla valves correspond, takes back the high-temperature flue gas, guarantees other battery module 1's safety.

The first side plates 23 of the battery cases 2 are each provided with an explosion-proof valve 4, and referring to fig. 1 and 3, the flue gas passage beams 24 are communicated with the explosion-proof valves 4. The explosion-proof valve 4 discharges high-temperature flue gas out of the battery pack, so that the integral temperature of the battery pack is prevented from rising, and the explosion-proof valve 4 protects the safety of the battery pack.

Preferably, in the present embodiment, as shown in fig. 2 and 3, the flue gas channel beam 24 includes an intake beam 241 and an exhaust beam 242, the intake beam 241 is communicated with the exhaust beam 242, the exhaust valve is communicated with the intake beam 241, and the exhaust beam 242 is communicated with the explosion-proof valve 4. The plurality of intake beams 241 communicate with an exhaust beam 242. This kind of setting mode can reduce the space that flue gas passageway roof beam 24 occupy to the volume of further assurance battery package. In this embodiment, preferably, in order to ensure that the high-temperature flue gas can be rapidly discharged from the battery pack, the air inlet beams 241 are disposed on both sides of each battery module 1.

In this embodiment, the electric core assembly includes a plurality of electric cores that stack up the setting side by side, is provided with the electrode tab on the electric core. Every electricity core corresponds and is provided with a gas vent 111, and when thermal runaway appeared in the electricity core, the gas vent 111 that corresponds with this electricity core can be discharged the high temperature flue gas into air intake beam 241 through tesla valve in, then discharge battery case 2 through exhaust beam 242 and explosion-proof valve 4.

Preferably, in the present embodiment, the module case includes a second bottom plate, a second end plate 11 and a second side plate, the second end plate 11 and the second side plate are vertically disposed on the second bottom plate, respectively, and the exhaust holes 111 are disposed on the second end plate 11. The two second end plates 11 are provided with exhaust holes 111, so that high-temperature smoke can be discharged conveniently, and the purpose of protecting other electric cores is achieved.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A power battery pack, comprising:

the battery module (1) comprises a plurality of battery cell assemblies and a module shell which are arranged side by side, wherein exhaust holes (111) are formed in two ends of the module shell;

the battery shell (2) comprises a first bottom plate (21), a first end plate (22) and a first side plate (23), wherein the first end plate (22) and the first side plate (23) are respectively and vertically arranged on the first bottom plate (21), and a smoke channel beam (24) is arranged on the inner wall of the first bottom plate (21);

exhaust valve group (3), set up in the both ends of battery module (1), exhaust valve group (3) include a plurality of discharge valves, discharge valve respectively with exhaust hole (111) with flue gas passageway roof beam (24) intercommunication, discharge valve can make the flue gas unidirectional flow that battery module (1) produced extremely flue gas passageway roof beam (24).

2. The power battery pack according to claim 1, wherein the exhaust valve is a Tesla valve, and the exhaust holes (111) are arranged in one-to-one correspondence with the Tesla valve.

3. The power battery pack according to claim 2, wherein the module case includes a second bottom plate, a second end plate (11), and a second side plate, the second end plate (11) and the second side plate are vertically disposed on the second bottom plate, respectively, and the exhaust hole (111) is disposed on the second end plate (11).

4. The power battery pack according to claim 3, wherein the first side plate (23) of the battery housing (2) is provided with an explosion-proof valve (4), and the flue gas channel beam (24) is communicated with the explosion-proof valve (4).

5. The power battery pack according to claim 4, wherein the flue gas channel beam (24) comprises an intake beam (241) and an exhaust beam (242), the intake beam (241) is communicated with the exhaust beam (242), the exhaust valve is communicated with the intake beam (241), and the exhaust beam (242) is communicated with the explosion-proof valve (4).

6. The power battery pack according to claim 5, wherein the air intake beam (241) is disposed on both sides of each battery module (1).

7. The power battery pack of claim 6, wherein a plurality of the intake beams (241) communicate with one of the exhaust beams (242).

8. The power battery pack of claim 1, wherein the electric core assembly comprises a plurality of electric cores arranged in a side-by-side stacked manner, and electrode tabs are arranged on the electric cores.

9. The power battery pack as recited in claim 8, wherein each of the battery cells is provided with a corresponding vent hole (111).

10. The power battery pack according to claim 1, wherein the battery modules (1) are connected in series by copper bars (5).